Solve using factoring x^2+17x+72=12

x = - 5

x = - 12

Step-by-step explanation:

x² + 17x + 72 = 12

x² + 17x + 72 - 12 = 0

x² + 17x + 60 = 0

(x + 5)(x + 12) = 0

Two separate equations

x + 5 = 0

x + 12 = 0

x + 5 = 0

x + 5 - 5 = 0 - 5

x = - 5

x + 12 = 0

x + 12 - 12 = 0 - 12

x = - 12

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step-by-step explanation:

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours